I don't think it is not possible to enforce perfectly sequential numbers at the application level. This is the same problem as multiple threads trying to incre

I don't think it is not possible to enforce perfectly sequential numbers at the application level. This is the same problem as multiple threads trying to increment the same global variable. Unless there is mutual exclusion while the variable is being read/incremented there will be race conditions. I think the only way to enforce mutual exclusion for applications would be at the database layer (or any other layer where there is 1 resource that is shared between each application peer).